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Old 06-17-2014, 03:14 PM   #1
Registered: Jul 2011
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APT used by DPKG

When I try to use Software Manager in LinuxMint I get a message about APT being used by DPKG and the install does not work. I am trying to install Nautilus on LinuxMint 17 LMDE Mate 64 bit. I have had this problem installing other programs as well. Am I suppose to use apt-get on a command line?
Old 06-17-2014, 06:18 PM   #2
Registered: Oct 2003
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There is a database that contains all of the updates and package data for the system (APT). If another application (such as dpkg) is currently accessing this database, you'll get that error. It is usually one of two things:

1. There is an update/updates in progress in the background (in which case trying again a little later should be ok)
or 2. Something crashed/was killed while updating, in which case a lockfile may still exist which says that the database is already in use. In this case, you'd need to delete the file /var/lib/dpkg/lock by hand.
Old 06-17-2014, 08:47 PM   #3
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Deleting file worked

Thank you. Deleting the file worked. It told me that the file was empty but I was then able to install Nautilus.
Old 06-17-2014, 09:26 PM   #4
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The file will never contain anything, but only needs to simply exist to lock the database.
Old 06-18-2014, 02:43 PM   #5
Registered: Nov 2007
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Several things can make apt/dpkg unhappy after it or a program built on top of it terminates prematurely. Sometimes the lock files can't be deleted because something (inactive) is still "using" them.

The following script fixes most of them. I found the details from a number of posts on stackexchange.

bigbird@ramdass:~/bin$ cat apt_unlock
## Get apt to work again after a crash/hang

sudo fuser -vki /var/lib/dpkg/lock
sudo fuser -vki /var/cache/apt/archives/lock
sudo fuser -vki /var/cache/debconf/config.dat
sudo dpkg --configure -a


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